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mei: synchronize irq before initiating a reset.

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We need to synchronize irqs before issuing reset to make sure that the
clients communication is concluded and doesn't leak to the reset flow
and confusing the state machine.

This issue is happening during suspend/resume stress testing.

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Tomas Winkler
2016-12-04 15:22:58 +02:00
committed by Greg Kroah-Hartman
parent 8d7cc7adce
commit 4a8efd4a1a
4 changed files with 38 additions and 4 deletions
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13
drivers/misc/mei/hw-me.c
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@@ -284,6 +284,18 @@ static void mei_me_intr_disable(struct mei_device *dev)
mei_hcsr_set(dev, hcsr);
}
/**
* mei_me_synchronize_irq - wait for pending IRQ handlers
*
* @dev: the device structure
*/
static void mei_me_synchronize_irq(struct mei_device *dev)
{
struct pci_dev *pdev = to_pci_dev(dev->dev);
synchronize_irq(pdev->irq);
}
/**
* mei_me_hw_reset_release - release device from the reset
*
@@ -1238,6 +1250,7 @@ static const struct mei_hw_ops mei_me_hw_ops = {
.intr_clear = mei_me_intr_clear,
.intr_enable = mei_me_intr_enable,
.intr_disable = mei_me_intr_disable,
.synchronize_irq = mei_me_synchronize_irq,
.hbuf_free_slots = mei_me_hbuf_empty_slots,
.hbuf_is_ready = mei_me_hbuf_is_empty,